Car Relay Tester Auto Relay Diagnostic Tool 12-24V Car Battery Voltage Detector

Diagnose automotive relay problems quickly and efficiently with this versatile Car Relay Tester. Designed for both professional mechanics and DIY car enthusiasts, this compact diagnostic tool allows you to easily test the condition and performance of vehicle relays without complicated equipment.

The tester is compatible with a wide range of 12V and 24V vehicle batteries, making it suitable for most cars, trucks, vans, and other automotive electrical systems. Simply connect the tester to the vehicle battery, insert the relay into the tester socket, and the device will automatically analyze the relay’s operation.

With its clear LED indicator system, the tester quickly displays the relay’s condition, allowing you to identify electrical faults, failures, or irregular switching. This helps save time during vehicle diagnostics and prevents unnecessary replacement of working components.

LED Color Indicator System

• Red LED – Indicates the tester is properly connected and receiving power from the battery.
• Green LED – Confirms the relay is functioning correctly and switching as expected.
• Yellow/Amber LED – Signals a potential relay fault or abnormal switching operation.
• No Light – May indicate no power supply, incorrect connection, or a completely defective relay.

Key Features

• Suitable for testing automotive relays powered by 12V and 24V batteries
• Quickly identifies faulty or malfunctioning relays
• Clear LED color indicators for easy diagnostics
• Simple plug-and-test operation
• Compact and lightweight design
• Durable construction for workshop or garage use
• Ideal for mechanics, technicians, and DIY vehicle owners

Easy to Use

The relay tester is designed for straightforward operation. Connect the clips to the vehicle battery, insert the relay into the tester slot, and observe the LED indicators. Within seconds you can determine whether the relay is functioning normally or requires replacement.

Its compact size makes it easy to store in your toolbox, workshop drawer, or even your vehicle’s glove compartment, ensuring you always have a reliable relay diagnostic tool available when needed.

Whether you are troubleshooting electrical issues, maintaining your vehicle, or performing professional automotive diagnostics, this Car Relay Tester is an essential addition to your toolkit.